Combined seat and backrest unit



FIG. 1 is a perspective view of a combined seat and backrest unit showing my design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a side elevational view thereof;

FIG. 6 is a rear elevational view thereof;

FIG. 7 is a perspective view of a further embodiment of the combined seat and backrest unit showing my design;

FIG. 8 is a top plan view of the embodiment of FIG. 7; and

FIG. 9 is a bottom plan view of the embodiment of FIG. 7. 

The ornamental design for the combined seat and backrest unit, as shown and described. 